tl;dr: DiscImageStudio is an open-source (GPL-3.0) tool that encodes images into CD-DA, DVD, and single-layer BD-R data streams so the burned disc surface shows a visible picture, using physical-layer tricks like controlled byte patterns (0D/AA for CD, A5/92 for DVD scrambling). It offers a Windows WPF GUI plus experimental Linux/macOS CLI, supports ISO/RAW/WAV+CUE export or direct IMAPI2 burning, and includes calibration tooling that improves track-pitch accuracy from ~10⁻⁶ to 10⁻¹⁴. The project builds on the earlier CDImage work and warns that live burning is experimental—use expendable media.